Magazine type hot-air heater



July 4, 1950 H. BARLOW MAGAZINE TYPE HOT-AIR HEATER Filed Aug. 26, 1946 "IIIIIIIIIIIIII'IIIIIIQ'II'IiiIllli 'llI, J

Patented July 4, 1950 "*UNITED 'sTArEs' PATENT oFFlcE 2,513,443 MA zrNE' TYPE nor-am HEATER I Harry Barlow, Freeman, W. Va. Application August 2 1946,.Serial No. 693,069

I Furnaces of present day type are generally more roomy at the top than at the bottom which has the disadvantage that the burning coal forms a crust at the top and prevents unburned coal from falling down on the grate which often puts out the fire. The aim of this invention is now to avoid this disadvantage by reversing the conditions. For that purpose I provide a furnace which is pyramidal in shape, that is to say, it is considerably more roomy at the bottom than at the top. This allows for the swelling of the burning coal which then automatically drops down on the grate, resulting in more complete combustion. p

The pyramidal furnace is enclosed in .a housing of cubical shape, provided with conduits for leading outside air up to near the top of the furnace, thus keeping it comparatively cool and then leading the air down the inclined furnace sides to be heated before it is distributed in the room.

In the accompanying drawing, one embodiment of the invention is illustrated. Like numerals relate to the same details in the different views.

Figure 1. is a partial vertical section of the heater with the front wall removed;

Figure 2 is a side elevation of the heater in Figure 1; and Figure 3 is a horizontal section on a plane along line 33 of Figure 2.

This heater consists of two main parts, namely, a furnace proper l and a surrounding housing therefor.

The latter is box-shaped having the top Ila, bottom |2, three side walls l3, l4, l5 all of square or rectangular shape, made of metal plate, and a front door I6 hinged as at the bottom at II, also of metal plate. The entire housing is raised slightly above the floor and stands on feet or supports [8, which may be constituted of channel iron.

Along each side wall l4 and I5 is provided a funnel-shaped air conduit I9 with a wide opening |9a at the top and narrowin downwardly towards the bottom l2, where it is closed. At different heights across the housing walls I4 and I5 are provided several transverse slots 20 which form air ports, leading from said conduits l9. Over each of the ports is furnished a slanting guard plate 2|, the function of which is to give the air stream a downward direction and keep out dirt and dust.

The furnace proper It consists of a base portion 25, which is of square configuration and 2 Claims. (01. 126-68) stands upon the housing bottom plate air into the ash pit 26, formed in said base' portion 25 and above which is placed the grate '21 of any conventional type. A suitable tray or pan, not shown, may be placed in the pit 26 toreceive dropping ashes from the grate.

On top of the base 25 and as a continuationthereof, four upwardly narrowing walls form a hollow frustum of a pyramid with two side walls 28, front wall 29 and rear wall 30. The top of the pyramid is closed by a removable cap 3|, thereby providing a closed combustion chamber and fire box from which the only outlet is the stove pipe 32 for smoke. The cap' 3| is spaced from the roof of the box or housing I sufficiently to permit cleaning of the furnace.

The front side 29 has a door 33 for filling the fire box and corresponding thereto, another flap or lid 34 on the front door l6 of the housing Ill, and near the bottom thereof a small ash pan door 35.

The relative positions of the conduits l9 as regards the pyramid side walls 28 of the furnace ID are such that a space 31 is provided therebetween. Cold air is thus caused to pass upwardly from near the floor as at 38 of the room wherein the heater is located and leaves the conduits at different heights through the ports 2|. The cool air will thus be heated as it is drawn up over the inclined walls 28, 29 and 30 being heated in the passage, and will collect in the upper part of the housing and be discharged down through the outlets 20.

This will result in a more even heating of a room than what is possible with ordinary heating systems, which permit the warm air to go direct up to the ceiling, furnishing no heat around the base of the heater.

Another advantage of my heater resides in the fact that cool air is delivered from the outside around the top of the furnace, so that the portion thereof above the fire box becomes cooled, which provides for a better combustion. It is of advantage to provide a small pipe 40 about one inch in diameter, leading downwardly from about the middle portion of the conduit l9 into the fire box, over the top of the fire. This will keep combustion gases down, thus providing for more complete combustion.

For regulating the draft in the furnace H], the upper end of a chain 4| can be reached from the outside of the housing for raising or lowering the usual draft door.

It is to be understood that the invention as I2, which is'perforated as at |2a for admitting'combustion herein disclosed may be varied from the details described and shown without departure from the spirit of the subjoined claims.

I claim:

1. An air heater of the character described, comprising a fuel combustion furnace having a base portion and an upwardly tapering top portion, a horizontally disposed grate separating the base portion and thetoptportion, a;h ousing en closing the furnace and including 'a=bottorn tupon which said base portion is mounted, means supporting said bottom on an underlying supporting surface, the interior dimensions of thethousing,

being materially greater than those ofth fur nace whereby an air space is provided'tin; 1311.34;

housing around the furnacaair inlet means in i said bottom leading into the beseor the furnace; air inlet means in said bottom leading intorthe;

air space, means for carrying ofi products of qombl stion jfrom, the furna ce, partition walls xt ding, p ard y a an inward incline, on "the ai spa e.in.-spa edpara nirlatidh wt ett'aperin' upper portion 'otjthe, furnace, sa idip titi'ionsydividing tbeair space intb bbet ai'r passageways "and, outer. air. passageways, the partitions ,te'r'rni ating short or; the top, of j the "'ans providing air outlets If eways, said' outletshb'eing, 1o c ed. esjdispos'ed a subs'tanti'al,dist nce beloiiv th horizontal 'p l'anefof the tops oi 'the.,.ia1ftitio'fis.. Z2. An air heatefii coinprisinjga. housing i- :r'n and side. Walls, "one; of. said ,s'i ,,movab1e to prtiVidta. a door, 'a run combusje ti'on furnace, Withinjthe housing v andlhavi'ng a bein the airsp'abe'ihto inner and outer air passageways, the isaicl other air openings communicating only with the inner air passageways, outwardly -'a'nd dOttuntiardly directed heated air discharge mean leading from the outer air passageways through certain of the side walls of the housing, the upwardly tapering tbp, portion oi the furnace b 'tng iir tite forin ..of fa,frusftuin or oyr mid,

REEERENGES-GITED v T r iiowif g, ,reterenoes fare,- of; record injt ii, ni so't: t "isfi'paiierita. I

' UNITEDErSTAW-SEAEENTS Number 

